What made Xiao Yizhan a little disappointed was that his grandson couldn't tell where Shen Yiyi got these formulas from, let alone whether Shen Yiyi's family also had elders engaged in aviation research. The only thing Luo Yu knows is that Shen Yi lives in a military compound, and it seems that her father is a certain leader of the army.

Xiao Yizhan secretly figured out that this girl's parents seem to be from the army, not the air force, and it doesn't seem to be from the aviation system. So at least her father shouldn't be from the aviation system, could it be that her mother is from the aviation system? But even if her mother studied aviation, it doesn't make sense that I have never seen the materials that this young man has seen.

Ren Xiao's puzzled question could not stop his curiosity about the correctness of the remaining formulas. With the help of his grandson Luo Yu, the grandfather and grandson checked the remaining formulas with the wind tunnel test data he recorded, and the results once again verified the correctness of the formulas that Luo Yu got from Shen Yiyi. Xiao Yizhan's excitement in his heart is really indescribable. He really wanted to contact a few of his old friends immediately and share with them these calculation formulas that seemed to him to be of great value, but he didn't think that Shen Yiyi had any more useful formulas that he hadn't come up with. With these formulas in my hands, I don't know if there are any other restrictions on the use of the road. After all, Shen Yiyi once said to his grandson that there is no problem with the use of these formulas in the low-speed section, but he did not tell his grandson whether there is a problem with the use of the high-speed section. Although there seems to be no problem when I used the wind tunnel test to check the calculation of a few measurement points just now, maybe those points are just a special case. Only after verifying the scope of use of these formulas from Shen Yiyi can he preliminarily determine the validity of the formulas.

Xiao Yizhan asked Luo Yu to go to Shen Yiyi again tomorrow. It's a good idea to let her come to the house and ask her about the formula. But this request was rejected by his grandson at the first time. Luo Yu's reason is. Shen Yiyi said that the next time the two meet, he must have a preliminary airfoil selection plan to submit. What if we meet tomorrow and can't come up with a plan by myself? I can't be untrustworthy and fat.

looked at his grandson Zhenzhen's eloquent appearance. Xiao Yizhan was also embarrassed to let him leave those promises to come to Shen Yiyi one by one tomorrow. After all, it was they who were parents who taught their children to be honest and honest since they were young, so how can they beat themselves up now? Therefore, the only thing Xiao Lao can do now is to use those formulas with his grandson to verify a bunch of low-speed airfoils, and then find out a few more suitable airfoils for the final choice.

Luo Yu was secretly proud when he saw that his grandfather had to study with him. He now feels like he's really right to join the program. Shen Yiyi seems to have some things worth learning from him, and he can guess the importance of these formulas just by looking at the situation that his grandfather is so nervous about asking about formulas. Thanks to his cleverness, he found an excuse to let his grandfather take the initiative to do work with him, saving himself from begging his grandfather. If I begged him to do it with me. Maybe my grandfather will ask for a few places.

Shen Yiyi naturally didn't know that Luo Yu had now used his tricks to earn his grandfather to check the wing shape together. In fact, although she guessed that Luo Yu's family might have an old-timer who was engaged in aviation, she didn't know that Lu Dao would be Xiao Yizhan, a big bull, otherwise she would have taken the initiative to come to the door for advice. She's busy working on the engine diagram of the paramotor.

It stands to reason that a two-stroke engine for a motorcycle for paramotor is sufficient. Because this engine is small and lightweight, and the paramotor itself does not require much power. But the problem is that the paramotor she wants to design is not an ordinary sporty paramotor, but to equip her father's troops. It is important to know that the paramotor is not used for tourism or aerial photography, but for the purpose of fighting. At the very least, the crew should carry some basic individual weapons. In this case, if you only use the engine of a motorcycle, as in the case of a sports paramotor, the power will be a little smaller. So Shen Yiyi used his brains one by one, in addition to choosing a paramotor airfoil with enough lift. It is also necessary to increase the power of the motorcycle engine. But the weight of an ordinary engine is a bit heavy, and it must be reduced. For Shen Yiyi, it was actually about redesigning a two-stroke engine.

If Shen Yiyi was really born in the aviation system. Then she should find a way to find a piston aero engine to install it. But Shen Yiyi, whether in his previous life or in this life, has no chance with the aviation industry. The formulas she gave Luo Yu were purely tossed up by herself when she was studying for a master's degree in engineering in order to write a thesis. In addition to these formulas, she really doesn't know much about aviation. But. After all, as a graduate student in mechanical engineering, she still knows the principle of the engine very well. So as a type of piston engine, there is nothing wrong with her researching directly from the motorcycle engine. In addition, as a textbook for later universities, this kind of engine with carburetor was taught as an example, and it can be said that the structure and characteristics were explained quite thoroughly. What Shen Yiyi has to do now is nothing more than to recall the things taught by the teacher in the past and draw them into drawings.

Of course, in fact, Shen Yiyi knows better about the engines of later cars. Theoretically, a car engine has more power than a motorcycle engine. But the problem is that later generations of engines have already adopted electronically controlled injection, and the carburetor has been canceled in consideration of environmental issues. But in 1994, United Electronics had not yet been established, where did she get an electronically controlled injection system? Moreover, the structure of the four-stroke engine is more complex and heavier than the two-stroke engine, so after thinking about it again, Shen Yiyi still decided to use the two-stroke engine.

When it comes to the optimization of motorcycle engines, we have to mention Shen Yiyi's side business in later generations. In later generations, there are many rich second generations who pursue excitement, and they are no longer satisfied with driving luxury cars to pull beautiful women, they like to ride heavy motorcycles. There are even a lot of motorcycle races underground. This requires motorcycles to be retrofitted with lightweight, high-power engines. And Shen Yiyi once received such a project in order to save money to buy a house and take on a part-time job after work. During that time, she didn't look for information on the Internet, and went to the group of those motorcycle enthusiasts to ask questions shamelessly. After several projects, she still has some fame in the circle. Therefore, now that he has picked up this line again, Shen Yiyi has sufficient experience.

After drawing the drawings of the engine for two days, Shen Yiyi next thought about where to produce. She was a little unsure of the processing capabilities of this era. Because in order to reduce weight, she chose aluminum for this engine. However, China in this era is far from becoming a factory in the world. What is the level of machining, she is not impressed at all. She only knows that the mechanical products of the present day are very rough in processing, and basically there is not much difference from the fifties and sixties. With such a level of craftsmanship and processing, can you create drawings drawn by the standards of the 21st century?

After thinking about it and feeling a little upset, Shen Yiyi simply put down the engine first and decided to go to Luo Yufeng's factory to have a look. Having said that, Luo Yufeng has been away for so long, and I don't know how her high-end fabrics have been purchased.

When I came to the factory, sure enough, because the previous stock materials had been used up, the hot-selling "No. 11 Middle School Uniform" has now been discontinued. Shen Yiyi had already discussed with Luo Yufeng before she went to Shanghai. If you really run out of preparation, then you must not be able to produce. You must not change to other cheap materials and smash the brand. In fact, in the past few days, Shen Yiyi has seen that some people seem to have worn imitation clothes, but at a glance, it can be seen that it is definitely not made in Luo Yufeng's factory, because there is no shape at all. This set of clothes, the style is not a big deal, isn't it a shirt and trousers, but when it comes to the core skills, in addition to the layout is the material. It can be said that clothes can be worn out of shape and can be so scraped, and they definitely have to rely on clothing. Therefore, in the current factory, the workers are cleaning and preparing for the New Year, and a few masters are responsible for changing the version according to the size of several subdivisions on the order, so that they can produce samples faster when the new year's reserve materials come.

Shen Yiyi came to the factory today, in fact, he was mainly looking for Zhou Gong in the factory, and wanted to ask if he could change an unfolding diagram to facilitate cutting if he was given a three-dimensional diagram of the wing. She came to Zhou Gong's office and found that Zhou Gong was on the phone.

She listened to it on the side, and it seemed that someone had explained something to Zhou Gong, and she only heard Zhou Gong agreeing to something. Zhou Gong saw her coming, but his eyes lit up. I only heard Zhou Gong say to the other end of the phone: "Manager Luo, classmate Shen Yiyi is here." ”

Shen Yiyi understood, it turned out that Luo Yufeng called back to arrange the work. She took the phone and said happily: "Sister Luo, how is it, are you coming back for the New Year?" ”

Luo Yufeng's refreshing voice came from the other end of the phone: "Sister." You've got all the clothes you ordered last time. Fortunately, when I came to Shanghai this time, not only did I find the material, but even the purchase price was 30% lower. This time we can keep more profits. ”

"Really? That's great, Sister Luo, are you ready to come back for the New Year? ”

"Of course. Now that it's all booked, what am I doing in Shanghai? Of course I'm going to come back quickly. I don't know what happened to the factory in the few days I was away. ”

Shen Yiyi thought for a while, and said into the phone: "Sister Luo, don't worry, there are Zhou workers in the factory who are watching them, there is no problem." I see that the workers are not idle today. I'm still cleaning when I don't sew. But Sister Luo, I want you to go to a place to order something for me, and then come back, okay? (To be continued......)

PS: I recommended it today, so I can still find everyone here, we have a fate, ha, ha. Xie Lu, Xie Youqin's heart-warming pink ticket. But can we talk about it? If you want to vote for a review, please give it a higher score. For the sake of my hard work, I have the motivation to have a higher praise index. Originally, I wanted to read the pink ticket and wanted to have an extra chapter, but I was disappointed when I saw that the evaluation score was low. The same old way, begging for tickets, begging for subscriptions, begging for collections.